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fix(error): use core::error::Error and core::fmt in error module #498

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Merged
Mec-iS merged 1 commit into from
Oct 22, 2026
Merged

fix(error): use core::error::Error and core::fmt in error module #498

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13 changes: 11 additions & 2 deletions src/error/mod.rs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
//! # Custom warnings and errors
use std::error::Error;
use std::fmt;
use core::error::Error;
use core::fmt;

#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
Expand Down Expand Up @@ -254,4 +254,13 @@ mod tests {
// ensure it can be used as a trait object
let _: &dyn Error = &e;
}

#[test]
fn failed_implements_core_error() {
// Failed must not depend on std for its Error impl (no-std, #413)
let e = Failed::predict("boom");
let err: &dyn core::error::Error = &e;
assert_eq!(err.to_string(), "Predict failed: boom");
assert!(err.source().is_none());
}
}
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